Thomeer E C, Stam C J, van Woerkom T C
State University of Leiden, The Netherlands.
Clin Electroencephalogr. 1994 Jul;25(3):94-8. doi: 10.1177/155005949402500305.
Desynchronization of the EEG in relation to mental activity can be demonstrated through various means. The acceleration spectrum entropy (ASE) is a method that quantifies the desynchronization of the EEG. It is a measure of the randomness or irregularity of a time series and ranges from 0 (straight line) to 100 (discrete random signal). The ASE was calculated for 20 EEGs under four conditions: "eyes closed," "eyes open," "eyes closed and mental arithmetic" and "eyes open and mental arithmetic." There was a significant increase between the conditions "eyes closed" and "eyes open" and a significant increase between the conditions "eyes closed" and "eyes closed and mental arithmetic." During eye opening the largest increase was seen in the occipital areas. Mental arithmetic showed an asymmetrical increase, namely in the left temporo-occipital region and in the right centro-temporal region. It is suggested that the ASE can be used to study cortical activation due to mental activity.
脑电图（EEG）与精神活动相关的去同步化可以通过多种方式得到证明。加速度谱熵（ASE）是一种量化脑电图去同步化的方法。它是衡量时间序列随机性或不规则性的指标，范围从0（直线）到100（离散随机信号）。在“闭眼”“睁眼”“闭眼且进行心算”和“睁眼且进行心算”这四种条件下，对20份脑电图计算了ASE。“闭眼”和“睁眼”条件之间以及“闭眼”和“闭眼且进行心算”条件之间有显著增加。睁眼时，枕叶区域的增加最为明显。心算显示出不对称的增加，即在左侧颞枕区域和右侧中央颞区域。有人提出，ASE可用于研究精神活动引起的皮质激活。
